On Nov 13, 2008, at 11:33 PM, Bridger Maxwell wrote:
How often? 60 times per second often? Once per second often? Every
minute,
often?
You'll need to calculate the amount of data you're expecting to
transfer,
worst case.
I would say about every five seconds often, max.
My gut instinct says you'll be fine.
The problem is, once I have
a worst case scenario calculated (which would be very difficult to
calculate, and would be little more than a bad guess), I wouldn't
know if
that is reasonable or not.
Well, even if it's 30 stations, and the data is 1 MB, that's 30 MB. A
quick little test showed me getting over 50 MB/sec on a 100-T LAN. I
wouldn't expect the overhead of DO to add up so much as to make it
useless for a 5 second+ refresh. Especially if your data is
significantly smaller, like "a page of apple docs."
Perhaps there is an example of what DO is well
suited for, and what it is not?
Perhaps, but none that I'm aware of. I've really only fiddled with it
for IPC.
Then, as we design these stations we can
either strive for absolute efficiency, or know there is a little
breathing
room if it makes the programming easier. I have absolutely no
experience
here (in network efficiency) so I feel like I am shooting in the dark.
You could certainly use some lower-level form of communication, to
handle the exchange, but if the vast majority of the communication is
just the raw data in one big package, they'll probably be roughly
equivalent. If you're actually sending a lot of little objects
separately, DO might not be up to the task.
If you're as close to being done as it sounds like you are, might as
well finish and see how well it works. :)
--
Seth Willits
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